One of the pivotal moments in American history inspires the Baltimore Ravens this season.

Americans last month honoured the 150th anniversary of the bloodiest battle ever to take place in North America -- Gettysburg.

The awe-inspiring national military park that marks the battle is located but 40 miles northwest of Ravens headquarters, and head coach John Harbaugh took his team there the first week of training camp.

“One thing we did was we made up T-shirts called ‘FIX BAYONETS,’ ” Harbaugh said in a one-on-one interview at training camp earlier this month.

That motto pays homage to the famous order given by Maine Col. Joshua Chamberlain, whose regiment’s bayonet charge against the Confederates protected the Union’s left flank on Day 2 of the epochal battle and turned the course of the war.

“You know, Chamberlain, 20th Maine, and the idea that they say we’re out of bullets and you have to surrender,” Harbaugh said, shaking his head. “That’s not us. That’s not who those soldiers were at Little Round Top at Gettysburg.